Volume 21 1978

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Browsing Volume 21 1978 by Author "Grine, F. E."

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    Allometric growth in the Diademodontinae (Reptilia; Therapsida); a preliminary report
    (Bernard Price Institute for Palaeontological Research, 1978) Grine, F. E.; Hahn, B. D.
    The hypothesis that many, if not all, of the South African and Zambian specimens, which have been regarded as different diademodontine genera and species, actually consitute a taxonomically homogeneous, ontogenetic growth series is tested. The principles of allometric growth were applied to this sample of fossils, which varied considerably in size and shape. The approach which was followed was exclusively morphometric. The results indicate that these specimens do represent various ontogenetic stages of a growth series of only a single species of Diademodon Seeley.
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    Notes on a specimen of Diademodon previously referred to Cyclogomphodon
    (Bernard Price Institute for Palaeontological Research, 1978) Grine, F. E.
    The anterior portion of the cranium of a medium-sized cynodont is described. The specimen was previously described briefly by Brink and Kitching (1953 ), who assigned it to the genus Cyclogomphodon Broom, and it was upon this specimen that they based their rediagnosis of that genus. The detailed study of this specimen has revealed that the supposed features which they considered to be generically distinctive for Cyclogomphodon either do not exist or that their validity falls away when this specimen is considered, in an ontogenetic context, as a not yet fully grown individual. It is concluded that this fossil represents a medium-sized, "juvenile", individual of Diademodon